package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFName;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;
    /**
     *  统计指定时间区间内的营业额数据
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {//LocalDate 为年，月，日

        //当前集合用于存取从begin到end范围内的每天的日期
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);

        while(!begin.equals(end)){
            //日期计算
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //将集合或数组以某拼接符拼接到一起形成新的字符串；
        String date = StringUtils.join(dateList, ",");

        //存在每天的营业额
        List<Double> turnoverList=new ArrayList<>();
        for (LocalDate Date : dateList) {
            //设置年，月，日，时，分，秒
            LocalDateTime beginTime=LocalDateTime.of(Date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(Date, LocalTime.MAX);

            //用map封装数据
            Map map=new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);//没有数据时为空
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        //将集合或数组以某拼接符拼接到一起形成新的字符串；
        String turnoverlist =StringUtils.join(turnoverList,",");

        return TurnoverReportVO.builder()
                .dateList(date)
                .turnoverList(turnoverlist)
                .build();
    }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存取从begin到end范围内的每天的日期
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);

        while(!begin.equals(end)){
            //日期计算
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //将集合或数组以某拼接符拼接到一起形成新的字符串；
        String date = StringUtils.join(dateList, ",");

        //存放每天的新增用户数量
        List<Integer> newUserList=new ArrayList<>();
        //存放每天的总用户数量
        List<Integer> totalUserList=new ArrayList<>();

        for (LocalDate Date : dateList) {

            LocalDateTime beginTime=LocalDateTime.of(Date,LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(Date,LocalTime.MAX);

            Map map =new HashMap<>();

            map.put("end",endTime);
            Integer totalUser = userMapper.countBymap(map);
            totalUser=totalUser==null? 0:totalUser;
            totalUserList.add(totalUser);

            map.put("begin",beginTime);
            Integer newUser = userMapper.countBymap(map);
            newUser=newUser==null? 0: newUser;
            newUserList.add(newUser);


        }
        return new UserReportVO().builder()
                .dateList(date)
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();

    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存取从begin到end范围内的每天的日期
        List<LocalDate> dateList=new ArrayList<>();

        dateList.add(begin);

        while(!begin.equals(end)){
            //日期计算
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //将集合或数组以某拼接符拼接到一起形成新的字符串；
        String date = StringUtils.join(dateList, ",");

        //存在每天的订单总数
        List<Integer> orderCountList=new ArrayList<>();
        //存在每天有效订单数
        List<Integer> validOrderCountList=new ArrayList<>();

        //订单总数
        Integer alltotalOrderCount=0;
        //有效订单数
        Integer allvalidOrderCount=0;
        //订单完成率
        Double orderCompletionRate=0.0;

        for (LocalDate Date : dateList) {
            //查询每天的订单总数  select count(id) from orders where order_time >? and order_time <?
            LocalDateTime beginTime = LocalDateTime.of(Date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(Date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            alltotalOrderCount+=orderCount;
            orderCountList.add(orderCount);
            //查询每天的有效订单数  select count(id) from orders where order_time >? and order_time <? and status = 5
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            allvalidOrderCount+=validOrderCount;
            validOrderCountList.add(validOrderCount);
        }
        if(alltotalOrderCount!=0){
            orderCompletionRate=(double)allvalidOrderCount/alltotalOrderCount;
        }

        return OrderReportVO.builder()
                .dateList(date)
                .totalOrderCount(alltotalOrderCount)
                .validOrderCount(allvalidOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .build();
    }
    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map=new HashMap<>();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }

    /**
     * 销量排名Top10
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        //select od.name sum(od.number) number from order_detail od,orders o where od.order_id=o.id and status=5 and
        // o.order_time>? and o.order_time<? group by od.name order by number desc limit 0,10

        //建立一个实体类，用来接收sql查询出来的结果
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {

        //查询数据库，获得营业数据--查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);//往当前时间倒30天,但不包括当天
        LocalDate dateEnd = LocalDate.now().minusDays(1);//往当前时间倒1天，但不包括当天

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //通过POI将数据写入到excel文件中,导入模板文件
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");//可以创建一个输入流，将excel模板导入

        try {
            //基于模板文件创建一个新的excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //填充数据
            XSSFSheet sheet = excel.getSheet("Sheet1");
            //时间
            sheet.getRow(1).getCell(1).setCellValue("时间： "+dateBegin+"至"+dateEnd);

            //概览数据
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            row=sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO data = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(data.getTurnover());
                row.getCell(3).setCellValue(data.getValidOrderCount());
                row.getCell(4).setCellValue(data.getOrderCompletionRate());
                row.getCell(5).setCellValue(data.getUnitPrice());
                row.getCell(6).setCellValue(data.getNewUsers());
            }

            //通过输出流将excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();//用response是为了返回给浏览器
            excel.write(out);
            //关闭资源
            out.close();
            excel.close();

        } catch (IOException e) {
            throw new RuntimeException(e);
        }



    }
}
